如题，我看b站上面有关于这个的教程，但是上来要连电台热点给我看懵了，请问大佬们有哪些电台支持连热点的？要实现卫星ft4通联在设备硬件上和软件上需要哪些准备工作？

你看到的是用IC-705配合BH6AAP开发的专用APP实现卫星FT4通联的视频

首先要双工uv全模式设备（单台设备无法双工的可以考虑另外搞sdr做接收机），剩下配件都简单

卫星ft4利用的是线性转发器，所以电台要能以usb模式发射。k5k6刷cec固件是不行的。由于卫星速度快，会产生多普勒效应，所以需要额外的追星软件来实时调整频率，如gpredict（linux）、look4sat（手机）、dtrac（手机）。连接电台有的用网络，有的用数据线，这要看电台的功能具体来定，如ic705应该是既可以用热点又可以用数据线的。最后，ft4调制解调使用的软件，手机电脑上都有一些。电脑可以用wsjt、jtdx，手机就不太清楚了。

线性卫星需要UV全模式电台，ft4上行LSB下行USB，并进行频率控制。你看到的应该是AAP做的那个APP，IC-705可以使用WLAN、蓝牙、有线进行连接。但是705用蓝牙控制传输不了音频，有线又不方便，所以采取的是用手机去连接IC-705热点的方案。目前这个APP还在测试，仅支持链接IC-705/IC-9700（仅有线）/FT-991A（仅有线）（若仅考虑IC-705的多普勒便携控制，可以用目前已经开源的IC705controler）下周我应该会发个帖子关于这个软件的初步说明？

十分感谢各位大佬的详细解答很有帮助！

@"BG2GQG"#p99490 好的，感谢大佬😋

您看到的应该是aap app配合705, 这个需要一台UV 全模式电台如果您是k6 可以尝试刷入 cec固件进行cw 通联但是建议先去fm卫星练手

How to achieve satellite FT4 communication?

BH6BYT

As the title suggests, I saw a tutorial on Bilibili about this, but it immediately asked me to connect to a radio hotspot, which was confusing. Could you please tell me which radios support connecting to hotspots?
What preparations are needed on both the hardware and software sides to enable satellite FT4 communication?

Liridice

What you are seeing is a video of satellite FT4 communication achieved through a dedicated app developed using the IC-705 and the BH6AAP.

BG4QBF

First, you need a dual-band UV full-mode device (if a single device cannot perform dual-band operation, consider acquiring a separate SDR receiver). The remaining accessories are simple.

BG4QBF

The FT4 uses a linear repeater, so the radio must be capable of transmitting in USB mode. Flashing the K5K6 with CEC firmware is not possible. Due to the high speed of the satellite, a Doppler effect will occur, requiring additional tracking software to adjust frequencies in real-time, such as gpredict (Linux), look4sat (mobile phone), and dtrac (mobile phone). Some radios connect via network, while others use data cables. This depends on the specific features of the radio, for example, an IC-705 should be able to use both a Wi-Fi hotspot and a data cable. Finally, there are some software applications available for FT4 modulation/demodulation that can be used on computers (e.g., WSJT, JTDR) and mobile phones, although I am not familiar with the specific options for mobile phones.

BG2GQG

The linear satellite requires a UV full-mode radio, with LSB uplink and USB downlink on frequency band ft4, along with frequency control.

You should be seeing the app developed by AAP. The IC-705 can connect using WLAN, Bluetooth, and wired connections.
However, using Bluetooth to control the IC-705 for audio transmission was not possible, and connecting via a cable was inconvenient. Therefore, the solution adopted was to connect to the IC-705 hotspot using a mobile phone.
Currently, this app is still in testing and only supports the IC-705/IC-9700 (only wired) / FT-991A (only wired).

(If only the IC-705's Doppler control functionality is considered, it can be used with the currently available open-source IC705 controller.)

Should I post an initial overview of this software next week?

BH6BYT

BG2GQG Okay, thank you! 😊

BH6BYT

Thank you very much for your detailed answers.
Very helpful!

BD3QID

What you should be seeing is the aap app working with the 705.
This requires a UV full-mode radio.
If you are using a K6, you can try flashing the CEC firmware for CW communication. However, I recommend practicing with FM satellite communication first.

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